Lowpass FIR filter code.
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Hello
I need to simulate some audio files using lowpass FIR filter (Digital). I have tried doing it using simulink but I need to do it using a code. Can anyone please tell me how to do it? I am facing a problem as I dot know how to incorporate the audio file(.wav). It would be great if anyone could give me some ideas of doing it.
Thank you:)
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Kukuh Priambodo
on 3 Dec 2016
Edited: Kukuh Priambodo
on 3 Dec 2016
fs = 10000; [x,fs] = audioread (fname); % input your file :) Wn = .35; N = 57; LP = fir1(N,Wn); [H_x,w]=freqz(LP); len_f=length(H_x); f=1/len_f:1/len_f:1; plot(f,20*log10(abs(H_x))); grid
%thanks
Answers (1)
Jan
on 4 Feb 2012
Perhaps this helps:
[Signal, Fs] = wavread(filename);
[B, A] = butter(4, (2 / Fs) * 500, 'low');
Filtered = filter(B, A, Signal);
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